Efficient conversion of carbohydrates into 5-hydroxymethylfurfural using choline chloride-based deep eutectic...

Area of Science:

• Green Chemistry
• Catalysis
• Biomass Conversion

Background:

• 5-hydroxymethylfurfural (5-HMF) is a key platform chemical derived from biomass.
• Efficient and sustainable synthesis routes for 5-HMF are crucial for biorefineries.
• Deep eutectic solvents (DESs) offer tunable properties for catalytic applications.

Purpose of the Study:

• To investigate the conversion of monosaccharides to 5-HMF using various DESs.
• To identify the most effective DES catalyst for 5-HMF synthesis.
• To evaluate the reusability and cost-effectiveness of the optimal catalyst.

Main Methods:

• Screening of different deep eutectic solvents (DESs) for monosaccharide conversion.
• Optimization of reaction conditions (temperature, time) for 5-HMF yield.
• Catalyst recovery and reusability tests.

Main Results:

• The DES composed of choline chloride and trichloroacetic acid ([ChCl][TCA]) at a 1:1 ratio exhibited the highest catalytic activity.
• A maximum 5-HMF yield of 82% was achieved from fructose in 1 hour at 100°C using [ChCl][TCA].
• [ChCl][TCA] was successfully recovered and reused up to three times with minimal activity loss.

Conclusions:

• [ChCl][TCA] is a highly effective and reusable catalyst for the synthesis of 5-HMF from carbohydrates.
• This study presents a low-cost and efficient method for producing 5-HMF, supporting sustainable chemical production.
• The findings contribute to the development of greener processes for valuable bio-based chemicals.